ASHA is the largest society of speech-language pathologists, audiologists, and speech and hearing scientists in the world. It serves as a regulatory agency that provides credentials for professionals, research on normal and disordered communication, and p

The National Center for Voice and Speech is a leading institute that provides services for patients with voice and speech disorders, and for professionals who serve them. Their website provides a wide range of information about voice and speech.

The Stuttering Foundation of America provides resources and support to people who stutter and their families, and supports research on stuttering. They are the first and largest nonprofit organization in the world working towards the prevention and improv